Rigid Caster with Cam Brake - 6" x 2" V-Groove Cast Iron Wheel with Roller Bearing - 1,000 lb. Capacity - Overall Height: 7-1/2" - Plate Size: 4-1/2" x 6-1/4" - Bolt Hole Centers: 3-3/8" x 5-1/4" to 2-7/16" x 4-15/16" - Attaching Bolt Size: 1/2"